EP3858002A1 - New prs design by extending the base signal - Google Patents
New prs design by extending the base signalInfo
- Publication number
- EP3858002A1 EP3858002A1 EP19782536.7A EP19782536A EP3858002A1 EP 3858002 A1 EP3858002 A1 EP 3858002A1 EP 19782536 A EP19782536 A EP 19782536A EP 3858002 A1 EP3858002 A1 EP 3858002A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- network node
- extended
- trs
- signal
- additional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/029—Location-based management or tracking services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
Definitions
- the present disclosure relates to wireless communications, and in particular, to position reference signals (PRS) design by extending a base signal.
- PRS position reference signals
- Positioning has been a topic in Long Term Evolution (LTE) standardization since the Third Generation Partnership Project (3GPP) Release 9. The primary objective is to fulfill regulatory requirements for emergency call positioning.
- Positioning in New Radio (NR) is proposed to be supported by the architecture shown in PIG. 1.
- the Location Management Punction (LMP) is the location server in NR.
- LMPa New Radio Positioning Protocol A
- NRPPa New Radio Positioning Protocol A
- RRC Radio Resource Control
- Enhanced Cell ID Essentially cell ID information to associate the device to the serving area of a serving cell, and then additional information to determine a finer granularity position;
- GNSS Global Navigational Satellite System
- E-SMLC evolved serving mobile location center
- OTDOA Observed Time Difference of Arrival
- UTDOA Uplink TDOA
- the device is requested to transmit a specific waveform that is detected by multiple location measurement units (e.g., a network node such as an eNB) at known positions. These measurements are forwarded to E-SMLC for multilateration.
- location measurement units e.g., a network node such as an eNB
- the 3GPP NR radio technology is positioned to provide added value in terms of enhanced location capabilities.
- the operation in low and high frequency bands (i.e., below and above 6GHz) and utilization of massive antenna arrays provide additional degrees of freedom to substantially improve the positioning accuracy as compared with older technologies.
- the possibility to use wide signal bandwidth in low and especially in high bands brings new performance bounds for user location for well-known positioning techniques based OTDOA and UTDOA, Cell-ID or E-Cell-ID etc., utilizing timing measurements to locate the wireless device (WD).
- the recent advances in massive antenna systems (massive multiple input multiple output (MIMO)) can provide additional degrees of freedom to enable more accurate user location by exploiting spatial and angular domains of propagation channel in combination with time measurements.
- MIMO massive multiple input multiple output
- MC multi-carrier
- SC single-carrier waveforms
- the MC candidates include Cyclic-Prefix (CP)-OFDM, Windowed (W)- OFDM, Pulse-shaped (P)-OFDM, Unique-Word (UW)-OFDM, Universal-Filtered (UF)-OFDM, and Filter-Bank Multi-Carrier (FBMC) with Offset Quadrature Amplitude Modulation (OQAM), while the SC candidates include DFT-spread (Discrete Fourier Transform-s)-OFDM, and Zero- Tail (ZT)-DFT-s-OFDM.
- CP Cyclic-Prefix
- W Windowed
- P Pulse-shaped
- UW Unique-Word
- UW Universal-Filtered
- FBMC Filter-Bank Multi-Carrier
- OFQAM Filter-Bank Multi-Carrier
- DFT-spread Discrete Fourier Transform-s
- ZT Zero- Tail
- the CP-OFDM waveform is currently used in LTE for downlink transmissions. These features include: robustness to frequency selective channel, easy integration with MIMO, very good time localization, and a low complexity baseband transceiver design.
- the main drawbacks of OFDM are high PAPR and poor localization in frequency.
- the embodiments within this disclosure is not limited to the exemplary waveforms listed above. Other waveforms may also be included in the embodiments.
- PRS have still some similarities with cell-specific reference signals as defined in 3GPP Release 8. It is a pseudo-random quadrature phase shift keyed (QPSK) sequence that is being mapped in diagonal patterns with shifts in frequency and time to avoid collision with cell-specific reference signals and an overlap with the control channels such as the physical downlink control channel (PDCCH).
- QPSK quadrature phase shift keyed
- the LTE standard PRS provides three layers of isolation to improve hearability (i.e., the ability to detect weak neighbour cells):
- Each cell transmits a different PRS sequence (orthogonal to other PRS sequences in the code domain).
- Frequency domain PRS has a frequency re-use of six, i.e., six possible frequency arrangements (called frequency offset) are defined within the PRS bandwidth. If two cells have the same frequency offset, the PRSs collide in the frequency domain. In such cases, the isolation from the orthogonal PRS sequences distinguishes one cell from the other.
- Time domain If PRSs collide in the frequency domain, muting (time-based blanking) can make the PRS occasions again appear orthogonal to each other.
- the channel state information reference signal (CSI RS) for tracking comes in periodic bursts having one or two slots (FIG. 2). Both burst periodicity and slot offset is configurable through the radio resource control (RRC) parameter CSI-ResourcePeriodieityAndOffset.
- RRC radio resource control
- Positioning reference signals which are the main OTDOA’ s reference signal used in an LTE network are not available in NR standalone.
- RSTD measurements for NR OTDOA can be based on any existing 3GPP Rel-l5 NR DL signals including synchronization signal.
- the CSI-RS and TRS are potentially the best available options in the current available downlink reference signals.
- Some embodiments advantageously provide methods, systems, and apparatuses for position reference signals (PRS) design by extending a base signal.
- PRS position reference signals
- a network node configured to act as a transmission point and configured to communicate with a wireless device (WD).
- the network node includes a radio interface and a processing circuitry configured to obtain extended reference signal (RS) configurations from another network node.
- the radio interface and the processing circuitry are further configured to determine an extended RS waveform based on the extended RS configuration and to transmit the extended RS waveform to the WD.
- RS extended reference signal
- a method implemented in a network node acts as a transmission point and is configured to communicate with a wireless device (WD).
- the method includes obtaining extended reference signal (RS) configurations from another network node.
- the method further includes determining an extended RS waveform based on the extended RS configuration.
- the method includes transmitting the extended RS waveform to the WD.
- RS extended reference signal
- a wireless device is the provided.
- the WD is configured to communicate with a network node, the WD includes a radio interface and a processing circuitry configured to obtain extended reference signal, RS, configurations from the network node.
- the radio interface and a processing circuitry are further configured to determine a waveform associated with the extended RS and to detect a RS and estimate an associated time of arrival.
- the radio interface and the processing circuitry are configured to send a measurement report to the network node based on the estimated time of arrival.
- a method implemented in a wireless device is provided.
- the WD is configured to communicate with a network node.
- the method includes obtaining extended reference signal, RS, configurations from the network node.
- the method further includes determining a waveform associated with the extended RS.
- the method includes detecting a RS and estimate an associated time of arrival.
- the method includes sending a measurement report to the network node based on the estimated time of arrival.
- DL downlink
- Step 100 A transmission point (TP) obtains extended RS configurations from a network node;
- Step 110 The TP provides the extended + RS configuration to the location server;
- Step 120 The TP determines the new waveform based on the extended RS configuration
- Step 130 The TP transmits the extended RS waveform
- Step 200 A device obtains extended RS configurations from a network node
- Step 210 The device determines the waveform associated to the extended RS
- Step 220 The device detects a RS and estimates the associated time of arrival
- Step 230 The device sends a measurement report to a network node based on the estimated time of arrival (TOA)
- the basic steps 100-130 above are from a transmission point perspective, where a transmission point optionally receives (100) a configuration from a network node (e.g. the OAM system) of an extended RS configuration as detailed in the embodiments of this disclosure.
- the transmission point may also optionally send (110) the extended + the original reference signal configuration to a network node such as the location server.
- the transmission point determines (120) the associated reference signal waveform based on the received extension configuration and transmits (130) the extended reference signal.
- the basic steps 200-230 above are from a device perspective, where the device optionally and based on its capability obtains (or retrieves from a pre-configuration) (200) an extended RS configuration as detailed in the embodiments of this disclosure.
- the device may as a separate step determine (210) the waveform of the associated extended RS.
- the device either detects the original RS or the extended RS and estimates its time of arrival (TOA) (220). Then, the device sends a measurement report to a network node (e.g., the location server or a base station) based on the estimated TOA (230).
- a network node e.g., the location server or a base station
- FIG. 1 is an example architecture for positioning in New Radio
- FIG. 2 is a diagram of periodic bursts in one or two slots
- FIG. 3 is a design in frequency and time of a TRS
- FIG. 4 is a schematic diagram of an exemplary network architecture illustrating a communication system connected via an intermediate network to a host computer according to the principles in the present disclosure
- FIG. 5 is a block diagram of a host computer communicating via a network node with a wireless device over an at least partially wireless connection according to some embodiments of the present disclosure
- FIG. 6 is a flow chart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for executing a client application at a wireless device according to some embodiments of the present disclosure
- FIG. 7 is a flow chart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data at a wireless device according to some embodiments of the present disclosure
- FIG. 8 is a flow chart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data from the wireless device at a host computer according to some embodiments of the present disclosure
- FIG. 9 is a flow chart illustrating exemplary methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data at a host computer according to some embodiments of the present disclosure
- FIG. 10 is a flowchart of an exemplary process in a network node according to some embodiments of the present disclosure.
- FIG. 11 is a flowchart of an exemplary process in a wireless device for according to some embodiments of the present disclosure.
- relational terms such as“first” and“second,”“top” and“bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements.
- the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the concepts described herein.
- the singular forms“a”,“an” and“the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
- the joining term,“in communication with” and the like may be used to indicate electrical or data communication, which may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
- electrical or data communication may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
- the term“coupled,”“connected,” and the like may be used herein to indicate a connection, although not necessarily directly, and may include wired and/or wireless connections.
- the term“network node” used herein can be any kind of network node comprised in a radio network which may further comprise any of base station (BS), radio base station, base transceiver station (BTS), base station controller (BSC), radio network controller (RNC), g Node B (gNB), evolved Node B (eNB or eNodeB), Node B, multi- standard radio (MSR) radio node such as MSR BS, multi-cell/multicast coordination entity (MCE), relay node, donor node controlling relay, radio access point (AP), transmission points, transmission nodes, Remote Radio Unit (RRU) Remote Radio Head (RRH), a core network node (e.g., mobile management entity (MME), self-organizing network (SON) node, a coordinating node, positioning node, MDT node, etc.), an external node (e.g., 3rd party node, a node external to the current network), nodes in distributed antenna system (DAS), a spectrum access system (
- wireless device or a user equipment (UE) are used interchangeably.
- the WD herein can be any type of wireless device capable of communicating with a network node or another WD over radio signals, such as wireless device (WD).
- the WD may also be a radio communication device, target device, device to device (D2D) WD, machine type WD or WD capable of machine to machine communication (M2M), low-cost and/or low-complexity WD, a sensor equipped with WD, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles, Customer Premises Equipment (CPE), an Internet of Things (IoT) device, or a
- Narrowband IoT (NB-IOT) device etc.
- the generic term“radio network node” is used. It can be any kind of a radio network node which may comprise any of base station, radio base station, base transceiver station, base station controller, network controller, RNC, evolved Node B (eNB), Node B, gNB, Multi-cell/multicast Coordination Entity (MCE), relay node, access point, radio access point, Remote Radio Unit (RRU) Remote Radio Head (RRH).
- RNC evolved Node B
- MCE Multi-cell/multicast Coordination Entity
- RRU Remote Radio Unit
- RRH Remote Radio Head
- WCDMA Wide Band Code Division Multiple Access
- WiMax Worldwide Interoperability for Microwave Access
- UMB Ultra Mobile Broadband
- GSM Global System for Mobile Communications
- functions described herein as being performed by a wireless device or a network node may be distributed over a plurality of wireless devices and/or network nodes.
- the functions of the network node and wireless device described herein are not limited to performance by a single physical device and, in fact, can be distributed among several physical devices.
- Some embodiments involve configuring existing NR reference signals and NR data transmissions to allow for accurate measurements for positioning such as TOA and reference signal time difference (RSTD), and to configure WDs to perform such measurements.
- RSTD reference signal time difference
- FIG. 4 a schematic diagram of a communication system 10, according to an embodiment, such as a 3GPP-type cellular network that may support standards such as LTE and/or NR (5G), which comprises an access network 12, such as a radio access network, and a core network 14.
- a 3GPP-type cellular network that may support standards such as LTE and/or NR (5G), which comprises an access network 12, such as a radio access network, and a core network 14.
- the access network 12 comprises a plurality of network nodes l6a, l6b, l6c (referred to collectively as network nodes 16), such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area l8a, l8b, l8c (referred to collectively as coverage areas 18).
- Each network node l6a, l6b, l6c is connectable to the core network 14 over a wired or wireless connection 20.
- a first wireless device (WD) 22a located in coverage area l8a is configured to wirelessly connect to, or be paged by, the corresponding network node l6c.
- a second WD 22b in coverage area l8b is wirelessly connectable to the corresponding network node l6a. While a plurality of WDs 22a, 22b
- wireless devices 22 are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole WD is in the coverage area or where a sole WD is connecting to the corresponding network node 16. Note that although only two WDs 22 and three network nodes 16 are shown for convenience, the communication system may include many more WDs 22 and network nodes 16.
- a WD 22 can be in simultaneous communication and/or configured to separately communicate with more than one network node 16 and more than one type of network node 16.
- a WD 22 can have dual connectivity with a network node 16 that supports LTE and the same or a different network node 16 that supports NR.
- WD 22 can be in communication with an eNB for LTE/E-UTRAN and a gNB for
- the communication system 10 may itself be connected to a host computer 24, which may be embodied in the hardware and/or software of a standalone server, a cloud-implemented server, a distributed server or as processing resources in a server farm.
- the host computer 24 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider.
- the communication system 10 and the host computer 24 may extend directly from the core network 14 to the host computer 24 or may extend via an optional intermediate network 30.
- the intermediate network 30 may be one of, or a combination of more than one of, a public, private or hosted network.
- the intermediate network 30, if any, may be a backbone network or the Internet.
- the intermediate network 30 may comprise two or more sub networks (not shown).
- the communication system of FIG. 4 as a whole enables connectivity between one of the connected WDs 22a, 22b and the host computer 24.
- the connectivity may be described as an over-the-top (OTT) connection.
- the host computer 24 and the connected WDs 22a, 22b are configured to communicate data and/or signaling via the OTT connection, using the access network 12, the core network 14, any intermediate network 30 and possible further infrastructure (not shown) as intermediaries.
- the OTT connection may be transparent in the sense that at least some of the participating communication devices through which the OTT connection passes are unaware of routing of uplink and downlink communications.
- a network node 16 may not or need not be informed about the past routing of an incoming downlink communication with data originating from a host computer 24 to be forwarded (e.g., handed over) to a connected WD 22a. Similarly, the network node 16 need not be aware of the future routing of an outgoing uplink communication originating from the WD 22a towards the host computer 24.
- the network node is configured to act as transmission point (TP).
- the transmission point may include an antenna which may be a Multiple-Input Multiple- Output (MIMO) antenna including two or more antennas.
- MIMO Multiple-Input Multiple- Output
- a network node 16 is configured to include an extended RS waveform unit 32 which is configured to determine an extended RS waveform based on an extended RS configuration.
- a wireless device 22 is configured to include a TOA estimation unit 34 which is configured to detect a RS and estimate an associated time of arrival.
- a host computer 24 comprises hardware (HW) 38 including a communication interface 40 configured to set up and maintain a wired or wireless connection with an interface of a different communication device of the communication system 10.
- the host computer 24 further comprises processing circuitry 42, which may have storage and/or processing capabilities.
- the processing circuitry 42 may include a processor 44 and memory 46.
- the processing circuitry 42 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
- processors and/or processor cores and/or FPGAs Field Programmable Gate Array
- ASICs Application Specific Integrated Circuitry
- the processor 44 may be configured to access (e.g., write to and/or read from) memory 46, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read- Only Memory).
- memory 46 may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read- Only Memory).
- Processing circuitry 42 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by host computer 24.
- Processor 44 corresponds to one or more processors 44 for performing host computer 24 functions described herein.
- the host computer 24 includes memory 46 that is configured to store data, programmatic software code and/or other information described herein.
- the software 48 and/or the host application 50 may include instructions that, when executed by the processor 44 and/or processing circuitry 42, causes the processor 44 and/or processing circuitry 42 to perform the processes described herein with respect to host computer 24.
- the instructions may be software associated with the host computer 24.
- the software 48 may be executable by the processing circuitry 42.
- the software 48 includes a host application 50.
- the host application 50 may be operable to provide a service to a remote user, such as a WD 22 connecting via an OTT connection 52 terminating at the WD 22 and the host computer 24.
- the host application 50 may provide user data which is transmitted using the OTT connection 52.
- The“user data” may be data and information described herein as implementing the described functionality.
- the host computer 24 may be configured for providing control and functionality to a service provider and may be operated by the service provider or on behalf of the service provider.
- the processing circuitry 42 of the host computer 24 may enable the host computer 24 to observe, monitor, control, transmit to and/or receive from the network node 16 and or the wireless device 22.
- the communication system 10 further includes a network node 16 provided in a communication system 10 and including hardware 58 enabling it to communicate with the host computer 24 and with the WD 22.
- the hardware 58 may include a communication interface 60 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of the communication system 10, as well as a radio interface 62 for setting up and maintaining at least a wireless connection 64 with a WD 22 located in a coverage area 18 served by the network node 16.
- the radio interface 62 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
- the communication interface 60 may be configured to facilitate a connection 66 to the host computer 24.
- the connection 66 may be direct or it may pass through a core network 14 of the communication system 10 and/or through one or more intermediate networks 30 outside the communication system 10.
- the hardware 58 of the network node 16 further includes processing circuitry 68.
- the processing circuitry 68 may include a processor 70 and a memory 72.
- the processing circuitry 68 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
- FPGAs Field Programmable Gate Array
- ASICs Application Specific Integrated Circuitry
- the processor 70 may be configured to access (e.g., write to and/or read from) the memory 72, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
- the network node 16 further has software 74 stored internally in, for example, memory 72, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the network node 16 via an external connection.
- the software 74 may be executable by the processing circuitry 68.
- the processing circuitry 68 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by network node 16.
- Processor 70 corresponds to one or more processors 70 for performing network node 16 functions described herein.
- the memory 72 is configured to store data, programmatic software code and/or other information described herein.
- the software 74 may include instructions that, when executed by the processor 70 and/or processing circuitry 68, causes the processor 70 and/or processing circuitry 68 to perform the processes described herein with respect to network node 16.
- processing circuitry 68 of the network node 16 may include an extended RS waveform unit 32 configured to determine an extended RS waveform based on an extended RS
- the communication system 10 further includes the WD 22 already referred to.
- the WD 22 may have hardware 80 that may include a radio interface 82 configured to set up and maintain a wireless connection 64 with a network node 16 serving a coverage area 18 in which the WD 22 is currently located.
- the radio interface 82 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
- the hardware 80 of the WD 22 further includes processing circuitry 84.
- the processing circuitry 84 may include a processor 86 and memory 88.
- the processing circuitry 84 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
- the processor 86 may be configured to access (e.g., write to and/or read from) memory 88, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
- memory 88 may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
- the WD 22 may further comprise software 90, which is stored in, for example, memory 88 at the WD 22, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the WD 22.
- the software 90 may be executable by the processing circuitry 84.
- the software 90 may include a client application 92.
- the client application 92 may be operable to provide a service to a human or non-human user via the WD 22, with the support of the host computer 24.
- an executing host application 50 may communicate with the executing client application 92 via the OTT connection 52 terminating at the WD 22 and the host computer 24.
- the client application 92 may receive request data from the host application 50 and provide user data in response to the request data.
- the OTT connection 52 may transfer both the request data and the user data.
- the client application 92 may interact with the user to generate the user data that it provides.
- the processing circuitry 84 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by WD 22.
- the processor 86 corresponds to one or more processors 86 for performing WD 22 functions described herein.
- the WD 22 includes memory 88 that is configured to store data, programmatic software code and/or other information described herein.
- the software 90 and/or the client application 92 may include instructions that, when executed by the processor 86 and/or processing circuitry 84, causes the processor 86 and/or processing circuitry 84 to perform the processes described herein with respect to WD 22.
- the processing circuitry 84 of the wireless device 22 may include a TOA estimation unit 34 configured to detect a RS and estimate an associated time of arrival.
- the inner workings of the network node 16, WD 22, and host computer 24 may be as shown in FIG. 2 and independently, the surrounding network topology may be that of FIG. 4.
- Network infrastructure may determine the routing, which it may be configured to hide from the WD 22 or from the service provider operating the host computer 24, or both. While the OTT connection 52 is active, the network infrastructure may further take decisions by which it dynamically changes the routing (e.g., on the basis of load balancing consideration or reconfiguration of the network).
- One or more of the various embodiments improve the performance of OTT services provided to the WD 22 using the OTT connection 52, in which the wireless connection 64 may form the last segment. More precisely, the teachings of some of these embodiments may improve the data rate, latency, and/or power consumption and thereby provide benefits such as reduced user waiting time, relaxed restriction on file size, better responsiveness, extended battery lifetime, etc.
- a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve.
- the measurement procedure and/or the network functionality for reconfiguring the OTT connection 52 may be implemented in the software 48 of the host computer 24 or in the software 90 of the WD 22, or both.
- sensors (not shown) may be deployed in or in association with communication devices through which the OTT connection 52 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software 48, 90 may compute or estimate the monitored quantities.
- the reconfiguring of the OTT connection 52 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not affect the network node 16, and it may be unknown or imperceptible to the network node 16. Some such procedures and functionalities may be known and practiced in the art.
- measurements may involve proprietary WD signaling facilitating the host computer’s 24 measurements of throughput, propagation times, latency and the like.
- the measurements may be implemented in that the software 48,
- the host computer 24 includes processing circuitry 42 configured to provide user data and a communication interface 40 that is configured to forward the user data to a cellular network for transmission to the WD 22.
- the cellular network also includes the network node 16 with a radio interface 62.
- the network node 16 is configured to, and/or the network node’s 16 processing circuitry 68 is configured to perform the functions and/or methods described herein for preparing/initiating/maintaining/supporting/ending a transmission to the WD 22, and/or preparing/terminating/maintaining/supporting/ending in receipt of a transmission from the WD 22.
- the host computer 24 includes processing circuitry 42 and a communication interface 40 that is configured to a communication interface 40 configured to receive user data originating from a transmission from a WD 22 to a network node 16.
- the WD 22 is configured to, and/or comprises a radio interface 82 and/or processing circuitry 84 configured to perform the functions and/or methods described herein for preparing/initiating/maintaining/supporting/ending a transmission to the network node 16, and/or preparing/terminating/maintaining/supporting/ending in receipt of a transmission from the network node 16.
- FIGS. 4 and 5 show various“units” such as extended RS waveform unit 32, and TOA estimation unit 34 as being within a respective processor, it is contemplated that these units may be implemented such that a portion of the unit is stored in a corresponding memory within the processing circuitry. In other words, the units may be implemented in hardware or in a combination of hardware and software within the processing circuitry.
- FIG. 6 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIGS. 4 and 5, in accordance with one embodiment.
- the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIG. 5.
- the host computer 24 provides user data (block S100).
- the host computer 24 provides the user data by executing a host application, such as, for example, the host application 74 (block S102).
- a second step the host computer 24 initiates a transmission carrying the user data to the WD 22 (block S104).
- the network node 16 transmits to the WD 22 the user data which was carried in the transmission that the host computer 24 initiated, in accordance with the teachings of the embodiments described throughout this disclosure (block S106).
- the WD 22 executes a client application, such as, for example, the client application 114, associated with the host application 74 executed by the host computer 24 (block S108).
- FIG. 7 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIG. 4, in accordance with one embodiment.
- the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS. 4 and 5.
- the host computer 24 provides user data (block Sl 10).
- the host computer 24 provides the user data by executing a host application, such as, for example, the host application 74.
- the host computer 24 initiates a transmission carrying the user data to the WD 22 (block Sl 12).
- the transmission may pass via the network node 16, in accordance with the teachings of the embodiments described throughout this disclosure.
- the WD 22 receives the user data carried in the transmission (block s 114).
- FIG. 8 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIG. 4, in accordance with one embodiment.
- the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS. 4 and 5.
- the WD 22 receives input data provided by the host computer 24 (block Sl 16).
- the WD 22 executes the client application 114, which provides the user data in reaction to the received input data provided by the host computer 24 (block S 118).
- the WD 22 provides user data (block S120).
- the WD provides the user data by executing a client application, such as, for example, client application 114 (block S122).
- client application 114 may further consider user input received from the user.
- the WD 22 may initiate, in an optional third substep, transmission of the user data to the host computer 24 (block S124).
- the host computer 24 receives the user data transmitted from the WD 22, in accordance with the teachings of the embodiments described throughout this disclosure (block S126).
- FIG. 9 is a flowchart illustrating an exemplary method implemented in a communication system, such as, for example, the communication system of FIG. 4, in accordance with one embodiment.
- the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS. 4 and 5.
- the network node 16 receives user data from the WD 22 (block S128).
- the network node 16 initiates transmission of the received user data to the host computer 24 (block S130).
- the host computer 24 receives the user data carried in the transmission initiated by the network node 16 (block S132).
- FIG. 10 is a flowchart of an exemplary process in a network node 16 according to some embodiments of the present disclosure.
- the process includes obtaining, via the processor 70, extended reference signal (RS) configurations from another network node 16 (block S134).
- the process also includes determining, via the extended RS waveform unit 32, an extended RS waveform based on the extended RS configuration (block S136).
- the process also includes transmitting, via the radio interface 62, the extended RS waveform to the WD 22 (block S138).
- the processing circuitry 68 is further configured to provide an extended RS configuration to a location server.
- one RS per cell for time and frequency tracking purposes is transmitted, via the radio interface 62.
- one two slot RS per cell with a burst periodicity for time and frequency tracking purposes is transmitted, via the radio interface 62.
- FIG. 11 is a flowchart of an exemplary process in a wireless device 22 according to some embodiments of the present disclosure.
- the process includes obtaining, via the processor 86, extended reference signal, RS, configurations from the network node 16 (block S140).
- the process also includes determining, via the processor 86, a waveform associated with the extended RS (block S142).
- the process also includes detecting, via the TOA estimation unit 34, an RS and estimate an associated time of arrival (block S144).
- the process further includes sending, via the radio interface 82, a measurement report to the network node 16 based on the estimated time of arrival (block S146).
- the WD 22 obtains a preconfigured extended RS.
- the sections below provide details and examples of arrangements for position reference signals (PRS) design by extending a base signal.
- PRS position reference signals
- the TRS signal transmitted for frequency and time tracking purposes is utilized by the WD also for positioning measurements such as, e.g., TOA and RSTD.
- the WD is configured to utilize all TRS burst occurrences for positioning measurements.
- the WD is configured to utilize a subset of the TRS burst occurrences for positioning measurements, as given, e.g., by a periodicity which is a multiple of the TRS burst periodicity.
- the TRS is configured to improve the accuracy and coverage for the TRS based positioning measurements through a combination of one or more of the following configuration options:
- downlink data is not scheduled and not transmitted in slots in which a TRS to be used for positioning is transmitted in own cell or in another cell which is close enough to be impacted by interference from the data transmission.
- downlink data is not transmitted in symbols in which a TRS to be used for positioning is transmitted in own cell or in another cell which is close enough to be impacted by interference from the data transmission.
- a WD is scheduled with downlink data in a slot in which a TRS to be used for positioning is transmitted in own cell or in another cell which is close enough to be impacted by interference from the data transmission.
- the WD is, however, configured to rate match around symbols in which a TRS to be used for positioning is transmitted in own cell or in another cell which is close enough to be impacted by interference from the data transmission. In one group of embodiments this is accomplished by configuring either a RateMatchPattern in the PDSCH configuration (PDSCH-Config) or in the serving cell configuration (ServingCellConfigCommon) or by configuring multiple ZP-CSI resources covering the symbol.
- an additional positioning reference signal is transmitted and the WD is configured to utilize the TRS and the new signal in combination for improved positioning measurements.
- the APRS is transmitted in the same slot/slots as the TRS bursts. In another embodiment, the APRS is transmitted neighboring slots to the TRS burst.
- the APRS is a TRS.
- the additional TRS has the same periodicity as the original TRS.
- the additional TRS has a periodicity which is a multiple of that of the base TRS.
- the additional TRS has the same subcarrier offset as the base TRS it is
- the APRS has the same periodic burst structure as a TRS and the APRS burst has the same comb 4 subcarrier pattern and subcarrier offset configuration as the TRS burst but the APRS bursts have a different pattern in time compared to the TRS burst.
- the APRS can flexibly occupy any subset of the symbols within the slots of an APRS burst.
- the APRS is configured to utilize orthogonal resource elements in frequency and/or time in cells that interfere strongly with each other, e.g. neighboring cells.
- downlink data is not scheduled and not transmitted in slots in which an APRS is transmitted in an own cell or in another cell which is close enough to be impacted by interference from the data transmission
- downlink data is not transmitted in symbols in which an APRS is transmitted in an own cell or in another cell which is close enough to be impacted by interference from the data transmission.
- a WD is scheduled with downlink data in a slot in which an APRS is transmitted in an own cell or in another cell which is close enough to be impacted by interference from the data transmission.
- the WD is, however, configured to rate match around symbols in which an APRS is transmitted in an own cell or in another cell which is close enough to be impacted by interference from the data transmission. In one group of embodiments this is accomplished by configuring either a RateMatchPattern in the PDSCH configuration (PDSCH-Config) or in the serving cell configuration (ServingCellConfigCommon) or by configuring multiple ZP-CSI resources covering the symbol.
- Embodiment A ( one TRS per cell )
- Embodiment B ( one base TRS per cell augmented with additional TRS with lower periodicity) • Transmit one two slot TRS per cell with a TRS burst periodicity of 20ms for time and frequency tracking purposes.
- the additional TRS has the same slot offset and subcarrier offset as the TRS in the same cell but has different symbol positions.
- Embodiment C (12 beamformed TRSs)
- Embodiment Cl (12 beamformed TRSs augmented with 12 additional beamformed signals) • Transmit twelve beamformed one slot TRS’s per cell for time and frequency tracking purposes with a periodicity of 20ms.
- APRS additional positioning reference signals
- the APRS has the same comb structure and subcarrier offset as the corresponding TRS.
- Each APRS utilizes one symbol in the same slot as the corresponding TRS. See Table 1 below for an example embodiment for the symbol positions within the slot.
- the extension of additional symbols can be in the time domain, the code domain or in the frequency domain or the combination of them.
- the measurement is performed by correlating the received signal with both the base signal and the additional signal and a combined correlation is formed by adding the two correlations together with different weight and with a time offset given by the corresponding time offset between the two transmitted signals.
- the weights are defined by the maximum-ratio combining (MRC) criteria.
- the device estimates TOA separately using the base signal and the additional signal, and combine the estimated TOA into one TOA per set of base and additional signal.
- the combination comprises selecting the first TOA of the TOAs of base and additional signals.
- the device may refrain from considering the additional signal.
- the devices depending on their capabilities can be either configured to monitor the base part of the signal unaware of the extension, or in another embodiment they can be configured to monitor the combined bae and additional signal [00111]
- the configuration of a WD 22 to use a base signal together with an additional signal for positioning could be done in one of the two following ways:
- the configuration could be done using NR RRC or over a new protocol between the WD 22 and a position entity in the network, called e.g. NPP (NR Positioning Protocol)
- NPP NR Positioning Protocol
- downlink data is not scheduled and not transmitted in slots in which a base signal or additional signal is transmitted in own cell or in another cell which is close enough to be impacted by interference from the data transmission
- downlink data is not transmitted in symbols in which a base signal or additional signal is transmitted in own cell or in another cell which is close enough to be impacted by interference from the data transmission.
- a WD 22 is scheduled with downlink data in a slot in which a base signal or additional signal is transmitted in own cell or in another cell which is close enough to be impacted by interference from the data transmission.
- the WD 22 is, however, configured to rate match around symbols in which a base signal or additional signal is transmitted in own cell or in another cell which is close enough to be impacted by interference from the data transmission. In one group of embodiments this is accomplished by configuring either a RateMatchPattern in the physical downlink shared channel (PDSCH) configuration (PDSCH-Config) or in the serving cell configuration (ServingCellConfigCommon) or by configuring multiple ZP-CSI resources covering the symbol.
- PDSCH physical downlink shared channel
- the RateMatchPattern information element (IE ⁇ is extended to allow for longer periodicities.
- an additional periodicity IE is added to the RateMatchPattern IE in addition to the IE periodicity AndPattern separating the periodicity from the pattern (see extract from 3GPP TS 38.331 V15.2.1 (2018-06) below).
- the IE RateMatchPattern can be used to configure one rate matching pattern for PDSCH.
- this corresponds to Ll IE 'rate-match-PDSCH -resource- set', see, for example, 3GPP Technical Standard (TS) 38.214, section FFS_Section.
- RateMatchPattern SEQUENCE ⁇
- n4 BIT STRING (SIZE (4)), n5 BIT STRING (SIZE (5)), n8 BIT STRING (SIZE (8)), nlO BIT STRING (SIZE (10)), n20 BIT STRING (SIZE (20)), n40 BIT STRING (SIZE (40))
- the concepts described herein may be embodied as a method, data processing system, computer program product and/or computer storage media storing an executable computer program. Accordingly, the concepts described herein may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects all generally referred to herein as a“circuit” or“module.” Any process, step, action and/or functionality described herein may be performed by, and/or associated to, a corresponding module, which may be implemented in software and/or firmware and/or hardware. Furthermore, the disclosure may take the form of a computer program product on a tangible computer usable storage medium having computer program code embodied in the medium that can be executed by a computer. Any suitable tangible computer readable medium may be utilized including hard disks, CD- ROMs, electronic storage devices, optical storage devices, or magnetic storage devices.
- These computer program instructions may also be stored in a computer readable memory or storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instruction means which implement the function/act specified in the flowchart and/or block diagram block or blocks.
- the computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
- Computer program code for carrying out operations of the concepts described herein may be written in an object oriented programming language such as Java® or C++.
- the computer program code for carrying out operations of the disclosure may also be written in conventional procedural programming languages, such as the "C" programming language.
- the program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer.
- the remote computer may be connected to the user's computer through a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
- LAN local area network
- WAN wide area network
- Internet Service Provider for example, AT&T, MCI, Sprint, EarthLink, MSN, GTE, etc.
- RS extended reference signal
- Embodiment A2 The network node of Embodiment Al, wherein the processing circuitry is further configured to provide an extended RS configuration to a location server.
- Embodiment A3 The network node of Embodiment Al, wherein one RS per cell for time and frequency tracking purposes is transmitted.
- Embodiment A4 The network node of Embodiment Al, wherein one two slot RS per cell with a burst periodicity for time and frequency tracking purposes is transmitted.
- Embodiment B 1. A method implemented in a network node, the method comprising: obtaining extended reference signal (RS) configurations from another network node; determining an extended RS waveform based on the extended RS configuration; and transmitting the extended RS waveform to the WD.
- Embodiment B3 The method of Embodiment Bl, wherein one RS per cell for time and frequency tracking purposes is transmitted.
- Embodiment B4 The method of Embodiment Bl, wherein one two slot RS per cell with a burst periodicity for time and frequency tracking purposes is transmitted.
- a wireless device configured to communicate with a network node, the WD configured to, and/or comprising a radio interface and/or processing circuitry configured to:
- Embodiment C2 The WD of Embodiment Cl, wherein the WD obtains a preconfigured extended RS.
- Embodiment Dl A method implemented in a wireless device (WD), the method comprising:
- Embodiment D2 The method of Embodiment Dl, wherein the WD obtains a preconfigured extended RS.
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US8401111B2 (en) * | 2009-03-13 | 2013-03-19 | Qualcomm Incorporated | Method and apparatus for sequencing and correlating a positioning reference signal |
US20130308567A1 (en) * | 2012-05-15 | 2013-11-21 | Qualcomm Incorporated | Methods and apparatus for positioning reference signals in a new carrier type |
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US10317509B2 (en) * | 2016-03-31 | 2019-06-11 | Qualcomm Incorporated | PRS-based terrestrial beacon system (TBS) implementations |
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US10090980B2 (en) | 2017-01-08 | 2018-10-02 | At&T Intellectual Property I, L.P. | Transmission of demodulation reference signals for a 5G wireless communication network or other next generation network |
US11399356B2 (en) * | 2018-06-26 | 2022-07-26 | Qualcomm Incorporated | Synchronization signal block (SSB)-based positioning measurement signals |
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US20220086787A1 (en) * | 2019-01-11 | 2022-03-17 | Telefonaktiebolaget Lm Ericsson (Publ) | Wireless device, network node and methods performed therein for time of arrival estimation |
US11082183B2 (en) * | 2019-09-16 | 2021-08-03 | Qualcomm Incorporated | Comb shift design |
US20210099965A1 (en) * | 2019-09-27 | 2021-04-01 | Qualcomm Incorporated | Conditions for multi-round-trip-time positioning |
US11638121B2 (en) * | 2019-10-03 | 2023-04-25 | Qualcomm Incorporated | Real time difference (RTD) reporting for mobile device-based positioning |
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